Related Clues:

• Word often seen in green
• Route interruption
• Telegram word
• ''Go no farther!''
• Return on investment
• Duck ______
• Forgo the bus
• 'Let it be!'
• Give it a rest
• You may come to it
• Put the brakes on
• Tour part
• Red alert?
• "Don't take another step!"
• What 28-Across means